Contribution of Peripheral Chemoreceptor Drive in Exercise Hyperpnea in Humans
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概要
- 論文の詳細を見る
The peripheral chemoreceptors play a dominant role in the respiratory compensation of lactic acidosis during heavy exercise of humans. Our object was to determine the contribution of peripheral chemoreceptors to exercise hyperpnea during mild to moderate and heavy exercise above the anaerobic threshold. We used a hyperoxic suppression test in six normal male subjects. Inspired gas was abruptly changed without the subjects knowledge from air to pure oxygen for 5 to 6 breaths. The maximal ventilatory depression after O2 breathing was 5.5 ± 1.7 L/min (BTPS) at mild exercise, and the depression increased with increasing exercise intensity up to 12.8 ± 4.1 L/min (BTPS). The relative contribution of the peripheral chemoreceptors to ventilation in terms of percentage of the maximal ventilatory depression was maintained, being 20% throughout the entire work ranges studied. The contribution of the peripheral chemoreceptors to total ventilation is hardly altered by lactic acidosis caused by heavy exercise above the anaerobic threshold according to our data. These results suggested that the peripheral chemoreceptors may not be solely responsible for excessive hyperventilation, or residual activities of peripheral chemoreceptors still exist after O2 breathing especially during heavy exercise above the anaerobic threshold.
- 日本生理人類学会の論文
- 1996-11-01
著者
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Honda Yoshiyuki
Department of Physiology, School of Medicine, Chiba University
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Masuda Atsuko
Department Of Physiology
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Masuda Atsuko
Department Of Biological Sciences Faculty Of Science Nara Women's University
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Honda Y
Department Of Physiology
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Honda Yoshiyuki
Department Of Physiology School Of Medicine Chiba University
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Honda Yoshiyuki
Department Of Physiology
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KOBAYASHI Toshio
Health Science Center, Tokyo University of Mercantile Marine
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Ohdaira Tetsuro
Departmanets of Respiratory Medicine, Nishi-Niigata Chuo National Hospital
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MASUDA Atuko
Department of Physiology
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SAKAKIBARA Yoshikazu
Kanazawa Institute of Technology
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Ohdaira Tetsuro
Department Of Med. School Of Med. Niigata University
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Ohdaira Tetsuro
Departmanets Of Respiratory Medicine Nishi-niigata Chuo National Hospital
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Kobayashi Toshio
Health Science Center Tokyo University Of Mercantile Marine
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